A new Civilization V Walkthrough Trailer offers an in-depth look at gameplay in Sid Meier's Civilization V, the installment in the turn-based strategy series that's expected next week. Firaxis' Peter Murray shows off the game, and many of the new features they've added to improve upon previous installments in the series, including hex tiles, a new interface, the new "social policy system," cultural victories, diplomacy changes, city-states, the introduction of tactical combat, and more. Here's the embedded version.